IBASE FWA8208 - Manual (Page 54)

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Appendix-A I/O Port Address Map
Each peripheral device in the system is assigned a set of I/O port addresses which also becomes the identity of the
device. The following table lists the I/O port addresses used.
Address Device Description
000h - 01Fh DMA Controller #1
020h - 03Fh Interrupt Controller #1
040h - 05Fh Timer
060h - 06Fh Keyboard Controller
070h - 07Fh Real Time Clock, NMI
080h - 09Fh DMA Page Register
0A0h - 0BFh Interrupt Controller #2
0C0h - 0DFh DMA Controller #2
0F0h Clear Math Coprocessor Busy Signal
0F1h Reset Math Coprocessor
1F0h - 1F7h IDE Interface
2F8h - 2FFh Serial Port #2(COM2)
2B0h- 2DFh Graphics adapter Controller
360h - 36Fh Network Ports
3F8h - 3FFh Serial Port #1(COM1)
Appendix-B Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the
IRQ used by the devices on board.
Level Function
IRQ0 System Timer Output
IRQ1 Keyboard
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ8 Real Time Clock
IRQ14 Primary IDE
IRQ15 Secondary IDE